AD7875KN 查看數據表（PDF） - Analog Devices

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AD7875KN

LC2MOS Complete, 12-Bit, 100 kHz, Sampling ADCs

Analog Devices 

AD7870/AD7875/AD7876

Parameter

AD7875/AD7876

K, B1 L, C1 T1

Units

Test Conditions/Comments

DC ACCURACY

Resolution

Minimum Resolution for Which

No Missing Codes Are Guaranteed

Integral Nonlinearity @ +25°C

TMIN to TMAX (AD7875 Only)

TMIN to TMAX (AD7876 Only)

Differential Nonlinearity

Unipolar Offset Error (AD7875 Only)

Bipolar Zero Error (AD7876 Only)

Full-Scale Error at +25°C2

Full-Scale TC2

Track/Hold Acquisition Time

DYNAMIC PERFORMANCE3 (AD7875 ONLY)

Signal-to-Noise Ratio4 (SNR)

@ +25°C

TMIN to TMAX

Total Harmonic Distortion (THD)

Peak Harmonic or Spurious Noise

Intermodulation Distortion (IMD)

Second Order Terms

Third Order Terms

ANALOG INPUT

AD7875 Input Voltage Range

AD7875 Input Current

AD7876 Input Voltage Range

AD7876 Input Current

12

12

12

Bits

12

12

12

Bits

±1

± 1/2 ± 1

LSB max

±1

±1

±1

LSB max

±1

± 1/2 ± 1

LSB max

±1

±1

± 1.5/–1.0 LSB max

±5

±5

±5

LSB max

±6

±2

±6

LSB max

±8

±8

±8

LSB max

Typical Full-Scale Error Is ± 1 LSB

± 60 ± 35 ± 60

ppm/°C max Typical TC is ± 20 ppm/°C

2

2

2

µs max

70

72

69

70

71

69

–80 –80 –78

–80 –80 –78

dB min

dB min

dB max

dB max

–80 –80 –78

–80 –80 –78

dB max

dB max

0 to +5 0 to +5 0 to +5

500 500 500

± 10 ± 10 ± 10

± 600 ± 600 ± 600

Volts

µA max

Volts

µA max

VIN = 10 kHz Sine Wave, fSAMPLE = 100 kHz

Typically 71.5 dB for 0 < VIN < 50 kHz

VIN = 10 kHz Sine Wave, fSAMPLE = 100 kHz

Typically –86 dB for 0 < VIN < 50 kHz

VIN = 10 kHz, fSAMPLE = 100 kHz

Typically –86 dB for 0 < VIN < 50 kHz

fa = 9 kHz, fb = 9.5 kHz, fSAMPLE = 50 kHz

fa = 9 kHz, fb = 9.5 kHz, fSAMPLE = 50 kHz

REFERENCE OUTPUT

REF OUT @ +25°C

REF OUT Tempco

Reference Load Sensitivity (∆REF OUT/∆I)

2.99 2.99 2.99

3.01 3.01 3.01

± 60 ± 35 ± 60

–1

–1

–1

V min

V max

ppm/°C max

mV max

Typical Tempco Is ± 20 ppm/°C

Reference Load Current Change (0 µA–500 µA)

Reference Load Should Not Be Changed

During Conversion.

LOGIC INPUTS

Input High Voltage, VINH

Input Low Voltage, VINL

Input Current, IIN

Input Current (12/8/CLK Input Only)

Input Capacitance, CIN5

LOGIC OUTPUTS

Output High Voltage, VOH

Output Low Voltage, VOL

DB11–DB0

Floating-State Leakage Current

Floating-State Output Capacitance5

2.4 2.4 2.4

0.8 0.8 0.8

± 10 ± 10 ± 10

± 10 ± 10 ± 10

10

10

10

4.0 4.0 4.0

0.4 0.4 0.4

10

10

10

15

15

15

V min

V max

µA max

µA max

pF max

V min

V max

µA max

pF max

VDD = 5 V ± 5%

VDD = 5 V ± 5%

VIN = 0 V to VDD

VIN = VSS to VDD

ISOURCE = 40 µA

ISINK = 1.6 mA

CONVERSION TIME

External Clock (fCLK = 2.5 MHz)

Internal Clock

8

8

8

7/9 7/9 7/9

µs max

µs min/µs max

POWER REQUIREMENTS

As per AD7870

NOTES

1Temperature ranges are as follows: AD7875: K, L Versions, 0°C to +70°C; B, C Versions, –40°C to +85°C; T Version, –55°C to +125°C. AD7876: B, C Versions,

–40°C to +85°C; T Version, –55°C to +125°C.

2Includes internal reference error and is calculated after unipolar offset error (AD7875) or bipolar zero error (AD7876) has been adjusted out.

Full-scale error refers to both positive and negative full-scale error for the AD7876.

3Dynamic performance parameters are not tested on the AD7876 but these are typically the same as for the AD7875.

4SNR calculation includes distortion and noise components.

5Sample tested @ +25°C to ensure compliance.

Specifications subject to change without notice.

REV. B

–3–

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